Solutions by everydaycalculation.com
1st number: 1 2/3, 2nd number: 3 9/21
53 - 7221 is -3721.
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Related: 10/3-72/21 5/6-72/21 5/3-72/42 15/3-72/21 5/9-72/21 5/3-72/63 25/3-72/21 5/15-72/21 35/3-72/21 5/21-72/21
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